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Original Articles

Unilateral and bilateral cochlear implants and the implant-plus-hearing-aid profile: Comparing self-assessed and measured abilities

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Pages 505-514 | Received 26 Aug 2007, Published online: 07 Jul 2009
 

Abstract

Patients fitted with one (CI) versus two (CI+CI) cochlear implants, and those fitted with one implant who retain a hearing aid in the non-implanted ear (CI+HA), were compared using the speech, spatial, and qualities of hearing scale (SSQ) (Gatehouse & Noble, 2004). The CI+CI profile yielded significantly higher ability ratings than the CI profile in the spatial hearing domain, and on most aspects of other qualities of hearing (segregation, naturalness, and listening effort). A subset of patients completed the SSQ prior to implantation, and the CI+CI profile showed consistently greater improvement than the CI profile across all domains. Patients in the CI+HA group self-rated no differently from the CI group, post-implant. Measured speech perception and localization performance showed some parallels with the self-rating outcomes. Overall, a unilateral CI provided significant benefit across most hearing functions reflected in the SSQ. Bilateral implantation offered further benefit across a substantial range of those functions.

Abbreviations
HHIE=

Hearing handicap inventory for the elderly

HHQ=

Hearing handicap questionnaire

SSQ=

Speech, spatial and qualities of hearing scale

WHO=

World Health Organization

Abbreviations
HHIE=

Hearing handicap inventory for the elderly

HHQ=

Hearing handicap questionnaire

SSQ=

Speech, spatial and qualities of hearing scale

WHO=

World Health Organization

Sumario

Se compararon pacientes con uno (CI) o dos (CI+CI) implantes cocleares con otros que usan un implante y un auxiliar auditivo en el oído no implantado (CI+HA), usando lenguaje, señales espaciales y cualidades de la escala auditiva (SSQ) (Gatehouse & Noble, 2004). El perfil CI+CI llevó a tasas de habilidades significativamente mayores que el Perfil CI en el campo de la audición espacial y en la mayoría de los aspectos de otras cualidades de la audición (segregación, naturalidad y esfuerzo para escuchar). Un subgrupo de pacientes completó el SSQ antes de la implantación y el perfil CI+CI mostró consistentemente una mayor mejoría que el perfil CI en todas las áreas. Los pacientes del grupo CI+HA no autoevaluaron diferencias con el grupo CI después de la implantación. La medición de la percepción del habla y el desempeño en la localización, mostraron paralelismo con los resultados autoevaluados. En general, un CI unilateral proporciona beneficios significativos en la mayoría de las funciones auditivas que se reflejan en el SSQ. La implantación bilateral ofrece beneficios adicionales en un rango substancial de estas funciones.

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